Just this moment I found this thread after a web search on this exact issue, as both my laptop (HP w/ AMD Ryzen 5 4500U with Radeon graphics) and my desktop (Lenovo w/ AMD Ryzen 7 4700G Radeon graphics) both constantly have experienced this ‘flash’ starting (IIRC) at least one or two updates before my current version 6.34.11482 update.
It does seem to be in-line with the nag popup (tho the popup hasn’t shown itself for quite awhile).
Just letting you know you’re not alone with the issue and it’s frustrating every time it happens.
This is definitely not a graphics card glitch; it’s a pop-up causing the main CCleaner window to lose focus. You can tell because of the Windows Title Bar color change. I captured and isolated some key frames to show what’s happening, but I can’t upload the images yet since the CCleaner Forum switched to this new format. (I can provide images to the mods if they wish to see them)
Anyway, in the images I’ve isolated, you can see the grey transition when clicking the orange “Upgrade” tab on CCleaner’s left side (which brings up the pop-ups for a free trial). The Windows Title Bar in frame #2 loses focus, and then frame #3 shows the main body of the CCleaner interface darkening (right before the pop-up appears):
In the isolated images I have from the “flash” after using Custom Clean, you can see the same pattern as you do when intentionally inducing the pop-up by clicking the “Upgrade” tab (but without the actual pop-up).
@SumGuy Did you read all this thread ?
We already tested and already know the exact causeof this. See my post above.
(I will admit that your way of triggering it is a new one, but not really needed as it’s doing it after every Custom Clean anyway).
It is triggered by an update nag-screen process, one that has been in CCleaner for a number of years now but didn’t previously behave to briefly show that grey screen like it is doing now.
As it started to happen after a Windows Update, not a CCleaner update, then it appears to be something in Windows that changed not something in CCleaner.
(Although CCleaner probably now needs changing to suit whatever it was that Windows changed).
I was just trying to further clarify and show more details.
Anyway, I don’t really see how this could be caused by a Windows update. I’m pretty sure Windows isn’t triggering a pop-up sequence that originates from within CCleaner…
Still present in the latest version (6.35).